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JEE Main 2002
Exam
JEE Main
Year
2002
Subject
Physics
Chapter
Nuclear Physics

JEE Main 2002 · Physics · Nuclear Physics

If N_0 is the original mass of the substance of half- life period...

If N0\mathrm{N}_0 is the original mass of the substance of half- life period t1/2=5\mathrm{t}_{1/2}=5 years, then the amount of substance left after 15 years is

Options

  1. AN0/8\mathrm{N}_0 / 8
  2. BN0/16\mathrm{N}_0 / 16
  3. CN0/2\mathrm{N}_0 / 2
  4. DN0/4\mathrm{N}_0 / 4

Correct answer

A. N0/8\mathrm{N}_0 / 8

Step-by-step solution

Amount left =N0/2n=N0/8(=N_0 / 2^n=N_0 / 8 \quad( Here n=15/5=3)n=15 / 5=3)
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